ELECTRON GUN WITH REDUCED-MOVEMENT OF CROSS-OVER POINT AT INCREASED BEAM CURRENT LEVELS, AND METHODS OF OPERATING SAME - Patent 0461205

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EP 0 461 205 A1

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(43)	Date of publication:
	18.12.1991 Bulletin 1991/51

(21)	Application number: 90908899.0

(22)	Date of filing: 28.12.1989

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International Patent Classification (IPC):

H01J 29/ 50^{( . )}

H01J 29/ 48^{( . )}

(86)	International application number:
	PCT/US1989/005853

(87)	International publication number:
	WO 1990/009675 (23.08.1990 Gazette 1990/20)

(84)	Designated Contracting States:
	DE FR GB NL

(71)	Applicant: IMAGING AND SENSING TECHNOLOGY CORPORATION
	Horseheads, NY 14845 (US)

(72)	Inventor:
	DUNBAR, Thomas, A. Horseheads, NY 14845 (US)

(74)	Representative: Goodanew, Martin Eric, et al
	MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge UB10 8BZ Ickenham Uxbridge UB10 8BZ (GB)

(54)	ELECTRON GUN WITH REDUCED-MOVEMENT OF CROSS-OVER POINT AT INCREASED BEAM CURRENT LEVELS, AND METHODS OF OPERATING SAME